Returns the number of closed workflow executions within the given domain that
meet the specified filtering criteria.

This operation is eventually consistent. The results are best effort and may
not exactly reflect recent updates and changes. Access Control

You can use IAM policies to control this action's access to Amazon SWF
resources as follows:

Use a Resource element with the domain name to limit the action to only
specified domains. Use an Action element to allow or deny permission to call
this action. Constrain the following parameters by using a Condition element
with the appropriate keys. 'tagFilter.tag': String constraint. The key is 'swf:tagFilter.tag'. 'typeFilter.name': String constraint. The key is 'swf:typeFilter.name'. 'typeFilter.version': String constraint. The key is 'swf:typeFilter.version'. If the caller does
not have sufficient permissions to invoke the action, or the parameter values
fall outside the specified constraints, the action fails. The associated
event attribute's cause parameter will be set to OPERATION_NOT_PERMITTED. For
details and example IAM policies, see Using IAM to Manage Access to AmazonSWF Workflows.